Long exposure Bode's galaxies M81 and M82
Messier 82, also called the "Cigar Galaxy," has an apparent brightness of 8.6 mag. It is likely a barred spiral galaxy, with the spiral arms beginning at the ends of a rather short bar.
About 500 million years ago, a close encounter with M81 drastically altered M82. In its inner region, the star formation rate increased dramatically, leading to a starburst. As a result, M82 is one of the brightest infrared galaxies and is also very luminous in the radio range (Ursa Major A). The starburst causes turbulent gas movement through supernova explosions, which appears as an outflow perpendicular to the galaxy plane.' role="button">
Michael Geissel
Messier 82, also called the "Cigar Galaxy," has an apparent brightness of 8.6 mag. It is likely a barred spiral galaxy, with the spiral arms beginning at the ends of a rather short bar.
About 500 million years ago, a close encounter with M81 drastically altered M82. In its inner region, the star formation rate increased dramatically, leading to a starburst. As a result, M82 is one of the brightest infrared galaxies and is also very luminous in the radio range (Ursa Major A). The starburst causes turbulent gas movement through supernova explosions, which appears as an outflow perpendicular to the galaxy plane.' role="button">
Information
Long exposure Bode's galaxies M81 and M82Long exposure Bode's galaxies M81 and M82Langzeitbelichtung Bodes galaxien M81 und M82
Messier 81, also known as "Bode's Galaxy," is a 7.0 mag bright spiral galaxy in the constellation Ursa Major. The apparent size of M81 is only about three percent of the area of the Andromeda Galaxy. At a distance of 12 million light-years, M81 is about four times farther away than the Andromeda Galaxy and therefore appears significantly smaller.Messier 82, also called the "Cigar Galaxy," has an apparent brightness of 8.6 mag. It is likely a barred spiral galaxy, with the spiral arms beginning at the ends of a rather short bar.
About 500 million years ago, a close encounter with M81 drastically altered M82. In its inner region, the star formation rate increased dramatically, leading to a starburst. As a result, M82 is one of the brightest infrared galaxies and is also very luminous in the radio range (Ursa Major A). The starburst causes turbulent gas movement through supernova explosions, which appears as an outflow perpendicular to the galaxy plane.Messier 81, also known as "Bode's Galaxy," is a 7.0 mag bright spiral galaxy in the constellation Ursa Major. The apparent size of M81 is only about three percent of the area of the Andromeda Galaxy. At a distance of 12 million light-years, M81 is about four times farther away than the Andromeda Galaxy and therefore appears significantly smaller.
Messier 82, also called the "Cigar Galaxy," has an apparent brightness of 8.6 mag. It is likely a barred spiral galaxy, with the spiral arms beginning at the ends of a rather short bar.
About 500 million years ago, a close encounter with M81 drastically altered M82. In its inner region, the star formation rate increased dramatically, leading to a starburst. As a result, M82 is one of the brightest infrared galaxies and is also very luminous in the radio range (Ursa Major A). The starburst causes turbulent gas movement through supernova explosions, which appears as an outflow perpendicular to the galaxy plane.Messier 81, auch als „Bodes Galaxie“ bekannt, ist eine 7,0 mag helle Spiralgalaxie im Sternbild Großer Bär. Die scheinbare Größe von M81 beträgt nur etwa drei Prozent der Fläche des Andromedanebels. Mit einer Entfernung von 12 Millionen Lichtjahren ist M81 etwa viermal weiter entfernt als der Andromedanebel und erscheint daher deutlich kleiner.
Messier 82, auch „Zigarrengalaxie“ genannt, hat eine scheinbare Helligkeit von 8,6 mag. Sie ist vermutlich eine Balkenspiralgalaxie, bei der die Spiralarme an den Enden eines eher kurzen Balkens beginnen.
Durch eine enge Begegnung mit M81 vor etwa 500 Millionen Jahren wurde M82 stark verändert. In ihrem inneren Bereich hat sich die Sternentstehungsrate drastisch erhöht, was zu einem Starburst führte. Dadurch gehört M82 zu den hellsten Infrarotgalaxien und ist auch im Radiobereich sehr leuchtstark (Ursa Major A). Der Starburst verursacht durch Supernovaexplosionen eine turbulente Gasbewegung, die als Ausströmung senkrecht zur Galaxienebene